Machine for forming finger-rings.



, PATENTED APR. 24, 1906 R. C. GROSSMANN.

MACHINE FOR FORMING FINGER RINGS.

APPLICATION FILED SEPT. 7, 1905.

W/TNESSESr g lNVE/VTOH W/LVJOMWWV/TVLML l m ia 6. 5 mm A. 6 grm k BY ATTORNEY M UNITED STATES PATENT OFFICE.

RUDOLPH (J. GROSSMANN, OF JERSEY CITY, N EWV JERSEY, ASSIGNOR TO SAMUEL AUFHAUSER, OF NEW YORK, N. Y.

MACHINE FOR FORMING FINGER-RINGS.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed September 7, 1905. Serial No. 277,295.

lb (U whom it Tll/(l lj concern:

Be it known that I, RUDOLPH U. GROSS- Maxix, a citizen of the United States, and a resident of Jersey City, in the county of Hudson and State of New Jersey, have made and invented certain new and useful Improvements in Machines for Forming Finger-Rings, of which the following is a specification.

My invention relates to an improvement in machines for forming or enlarging fingerrings, the object being to provide a device of this kind which shall be cheap, simple, and. inexpensive to manufacture, easily operated by unskilled labor, and effective in use; and with these and other ends in view it consists in certain novel features of construction and combinations of parts, as will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in end elevation of my improved machine. Fig. 2 is a sectional view taken on the line 2 2 of Fig. 1. Fig. 3 is a sectional view taken on the line 3 3 of Fig. 1. Fig. 4 is a sectional view taken on the line 4 4 of Fig. 3. Fig. 5 is a detail view showing the gears for rotating the shafts.

Referring to the drawings, 6 represents the base of the machine, intended to be screwed or otherwise secured to a table, bench, or other support, and has preferably cast integral therewith the upright ends 7 S. In these end pieces 7 8 is journaled the shaft 9, the rear end of which is provided with the gear 10, the forward end having rotatably mounted thereon the roller 11, grooved or hollowed out, as shown at 12, to conform to the shape of the outer side or surface of the ring under operation, said roller 11 being held in its proper position between the end piece 7 and the disk 13, the latter being held .in place by means of the screw 14, threaded into the forward end of the shaft 9, as illustrated in Fig. 2 of the drawings.

The upper ends of the pieces 7 8 are recessed or hollowed out to receive the bearing blocks 15 16, in which is joiu'naled the shaft 17, the rear end of the latter being provided with the gear 18, meshing with the gear 10, and with the handle 19, by which said shafts are rotated, the forward end of said shaft 17 extending outwardly beyond the bearingblock 15 and end piece 7 and over the roller 12. The bearing-blocks 15 16 have rotatably secured thereto the lower ends of the screws 20 21, threaded in the blocks 22 23, the latter resting on the tops of the upright ends 7 S and secured thereto by means of the screwbolts 24.

It will be apparent that the bearing-blocks 15 and 16, with the shaft 17, may be raised or lowered with respect to the shaft 9 by properly turning the screws 20 21, as illustrated in Figs. 1, 3, and 4 of the drawings. The end piece 7 is provided with recesses 25, in which are fitted the bars 26, the inner ends of these bars having threaded therein the ends of the spindles 27, the latter having mounted thereon the guide-rollers 28, slightly recessed or hollowed out in order to receive the ring 29 under operation.

To the base 6 of the machine are secured the lower ends of the springs 30, the upper ends being notched. and fitting around the screws 31, the inner ends of said screws being threaded into the end piece 7 and provided with a flange 32, and against which flanges bear the extreme ends of said springs when the screws are turned outwardly. These springs 30 are so bent that when the screws 31 are turned inwardly, as illustrated in Fig. 4, said springs will bear against the outer ends of the bars 26, the tension thereon causing the rollers 28 to bear tightly against the ring 29. W'hen, however, said screws 31 are turned outwardly, the flanges 32 will force the ends of said springs outwardly, allowing the bars 26 to be moved outwardly and the rollers 28 to recede out of contact with the ring 29.

In practice if a ring is to be formed the blank is first placed between the end 33 of the shaft 17 and the roller 12, the latter, as before stated, being grooved or recessed in accordance with the shape to be given to the outer side or surface of the ring. The screws 20 21 are then lowered, thereby lowering the shaft 17 until the proper pressure is brought to bear by the end 13 upon the ring-blank. The screws 31 are then turned imvardly, allowing the tcnsion of the springs 30 to be exerted upon the outer ends of the bars 26, the latter causing the rollers 28 to hug the ring tightly and retain it in its proper position. By then turning the handle 19 and causing the shafts 9 and 17 to rotate the ring is properly formed. These same operations are performed in stretching or enlarging a ring, the pressure exerted on the ring by means of the shaft 17 and roller 12 causing it to be enlarged, the rollers 28 retaining the ring in proper position. When completed, the ring may be removed by raising the screws 20 21 and turning outwardly the screws. 31 until the tension of the springs is removed from the rods 26, allowing the latter to be moved outwardly and the rollers 28 out of contact with the ring.

It will be understood from the foregoing that the device consists of but few parts, can be readily understood and operated by an unskilled person, and can be manufactured at a small initial cost.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A device of the character described, comprising a base and end pieces, a lower shaft provided at one end with a gear-wheel and at its opposite end with a roller, an upper driving-shaft vertio ally adjustable in said end pieces and having one end provided with a gear meshing with said former gear, and its opposite end extending beyond said end piece and over said roller, opposite and laterally-disposed rods adapted to slide in one of said end pieces and carrying guide-rollers, and springs adapted to exert their tension on the'ends'of said rods, substantially as described.

2. A device of the character described, comprising a base and end pieces, a lower shaft journaled in said end pieces and provided with a gear at its rear end and with a roller at its forward end, an upper adjustable driving-shaft geared to said lower shaft at one end and at its forward end extending outwardly over said roller, opposite and laterally-disposed rods adapted to slide in one of said end pieces and provided at one end with guide-rollers, and springs secured at their lower ends to said base and adjustable at their upper ends to engage With the outer ends of said sliding rods, substantially as described.

3. A device of the character described, comprising a base and end pieces, upper and lower shafts mounted in said end pieces, the former being adjustable toward and away from the latter, a roller loosely mounted on the end of one of said shafts, opposite and laterally-disposed rods adapted to slide in one of said end pieces and carrying guiderollers, springs secured to said base at one end, the opposite ends being adjustable toward the outer ends of said sliding rods, sub stantially as described.

Signed at New York, borough of Manhattan, in the county of New York and State of New York, this 6th day of September, A. D.

RUDOLPH O. GROSSMANN. Witnesses:

GEORGE Ooox, M. VAN NORTWIOK. 

